As the user responsible for the tag, I'll describe my rationale for it.
First of all, here's the question:
What is the significance of the numbers in "The Eleven Holy Numbers of the Mechanical Soul"?
Now, as I've said before, I consider a tag to be a Bat-Signal for experts. The tags I put on a question are meant as a call on experts on those subjects.
The story I was asking about was written by Natalia Theodoridou. Her story was heavily influenced by the Dutch artist Theo Jansen, even going as far as naming her protagonist for him. It also features the same kind of kinetic sculptures he makes.
So when I considered the experts I needed for an answer, the two types of experts that came to mind were experts on the writer, Natalia Theodoridou, and experts on Theo Jansen.
Natalia Theodoridou, being a writer of SF & Fantasy, is of course on topic, so I created a tag for her. Since Theo Jansen is better known than Natalia Theodoridou (there's a Wikipedia article on him, while there is none on her) and because his work has — to me — a science fiction feel to it, I decided to create a tag for him as well.
This tag was challenged and removed from the question; I declined to pursue the tag any further.